Method and apparatus for generating waste gases

ABSTRACT

This invention deals with a method for generating waste gases in which the chemical energy of a fuel supplied to a generator is released in the combustion chamber of the generator by the presence of an oxidant and due to the pressure, thermal and kinetic energy of the waste gases which, after expansion and acceleration, are led into an ejection and a contact area where exchange of energy takes place between the waste gases and the oxidant. The waste gases are then set in motion in a curvi linear path while at the same time transmission of the heat and motion of the oxidant which is sucked into and mixed with the waste gases in the contact area and in which area a part of the so called working medium, compressed by centrifugal force is braked by a diffusion means and guided back into the generator combustion chamber as oxidant for changing the chemical energy of the fuel into another form of energy while the remaining portion of the working medium is supplied to exhaust where it is put to a desired use, such as operating turbines, jet reactors, and the like or used to heat kettles or reactors and the like.

United States Patent [1 1 Kotoc METHOD AND APPARATUS FOR GENERATINGWASTE GASES [75] Inventor: Stefan Kotoc, Prague,

Czechoslovakia [73] Assignee: Ustav pro vyzkum motorovych vvozidel,Prague, Czechoslo\ akia [22] Filed: Apr. 7, 1972 [2]] Appl. No.:242,074

[52] 11.8. C1. Gil/39.69, 60/269, 417/158, 431/115 [51] Int. Cl. F23!1/04, F02g 1/00, F02k 11/00 [58] Field of Search 60/3952, 39.69, 60/269;417/158, 159, 171; 431/115, 116

[56] References Cited UNITED STATES PATENTS 2,938,658 5/1960 Foster417/171 2,230,447 4/1942 Pearce 417/158 2,686,473 8/1954 Vogel 60/270 RFOREIGN PATENTS OR APPLICATIONS 1,099,271 2/1961 Germany 60/3952 167,7748/1950 Austria 60/269 130,959 2/1951 Sweden 60/269 299,420 0/1936 GreatBritain 60/3952 Jan. 1, 1974 [57] ABSTRACT This invention deals with amethod for generating waste gases in which the chemical energy of a fuelsupplied to a generator is released in the combustion chamber of thegenerator by the presence of an oxidant and due to the pressure, thermaland kinetic energy of the waste gases which, after expansion andacceleration, are led into an ejection and a contact area where exchangeof energy takes place between the waste gases and the oxidant. The wastegases are then set in motion in a curvi linear path while at the sametime transmission of the heat and motion of the oxidant which is suckedinto and mixed with the waste gases in the contact area and in whicharea a part of the so called working medium, compressed by centrifugalforce is braked by a diffusion means and guided back into the generatorcombustion chamber as oxidant for changing the chemical energy of thefuel into another form of energy while the remaining portion of theworking medium is supplied to exhaust where it is put to a desired use,such as operating turbines, jet reactors, and the like or used to heatkettles or reactors and the like.

12 Claims, 3 Drawing Figures PAIENTEDJAH H974 3.782.111

SHEU 20$ 2 METHOD AND APPARATUS FOR GENERATING WASTE GASES A generatorfor carrying out the method includes a combustion chamber, a jetgenerator, a suction branch, a mixing chamber, a slot chamber and anexhaust manifold and associated parts.

BACKGROUND OF THE INVENTION The invention relates to a method forgenerating and utilizing waste gases in a generator in which there is anautomatic and constant passage of the working medium and where at thesame time there is created on the outlet of the generator a stream ofwaste gases under high pressure which have great inherent thermal andkinetic energy. The waste gases from these generators are supplied toappropriate consumers such as, for example, vehicular combustionengines, turbines or jet reactors; or thee waste gases can be suppliedto thermal consumers, such as, for example, kettles or reactors and thelike.

Waste gas generators of this type generally comprise as open a system aspossible with a stationary, that is, a constant flow and an externalsource of energy created by the combustion of fuel in the combustionchamber. The combustion process which takes place in the combustionchamber is usually supplied with air by means of a compressor, a fan, orby a direct supply of air through an inlet mechanism on the combustionchamber. The streaming of air into the combustion chamber may also beprincipally achieved by a pressure difference on the inlet and outletmechanism of the chamber and is generally achieved by pressurepulsations or by the difference of the specific weight of the coldingress air and the warmed air in the chamber. Known generators of thistype, both stationary or mobile, and their drive units usually consistof a combustion chamber, a compressor and a turbine. In order toaccomplish high specific output and efficiency, there is usuallyemployed in these devices compressors which compress the air in manystages before it is introduced into contact with the waste gases, whichhave a high temperature and which pass through several stages ofexpansion in a gas turbine which drives a compressor. As a result, sucha waste gas generator (also called a turbo-compressor) make jet engines,prop-jet engines or combustion turbines of vehicles in which they areemployed, highly expensive and are the most troublesome part of suchdevices from an operating viewpoint.

It is the object of the present invention to provide a method of wastegases generation, as well as the generator for the execution of themethod according to the present invention which overcomes theabovementioned disadvantages and provide substantially improvedproperties and characteristics in comparison to the known devices.

Moreover, it is an object of this invention to provide a waste gasgenerator which forms an integral part of the working medium system andyields heat and takes off heat from that system in a recurrentregenerative cycle.

SUMMARY OF THE INVENTION The method of generating waste gases accordingto the invention comprises changing the chemical energy of the fuelsupplied to the generator in the combustion chamber thereof in thepresence of an oxidant into waste gases having pressure, thermal andkinetic energies. The waste gases so formed after expansion and afteracceleration in the accelerating chamber of the generator are guidedinto an ejector chamber and into a contact exchanger chamber forexchange of the energy between the waste gases and the oxidant. Thecontact chamber is substantially in the form of a curved slot chambersetting the waste gases in motion and simultaneously transmitting heatand motion to the oxidant. The oxidant is sucked into the contactexchanger chamber by the ejector effect and is mixed with the wastegases. A part of the so created working medium is thereupon compressedby the centrifugal force and braked to a stop in the combustion chamberby diffusion after being split into a plurality of streams and passingthrough slotted openings in the contact exchange chamber and then isguided back into the combustion chamber as oxidant in a combined, singlestream for changing the chemical energy of the fuel into other types ofenergy. At the same time a second part of the working medium is takenfrom the slot chamber and supplied to a consuming means, such as aturbine, jet reactors, reaction kettles or reactors, and the like foruse of its pressure, kinetic and thermal energies where the first cycleof the energy changes and of the transfers is used as an external sourceof energy.

Full details of the present method and apparatus follow herein and willbe seen in the accompanying drawings.

THE DRAWINGS In the annexed drawings there is shown an example of agenerator of waste gases according to the invention and the method ofits use.

FIG. 1 there is a schematic, radial, cross sectional, elevational viewthrough a generator in accordance with the invention;

FIG. 2 is a cross sectional view in elevation showing in detail one formof starting means employed when using compressed gases to start thegenerator; and

FIG. 3 is a partial view in elevation and partial section showing aplurality of generators of the invention employed with a turboprop jetair-craft engine.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The method comprises,preferably, the continuous delivery of fuel into the combustion chamber,whenever there is created a gaseous medium which has a pressure andtemperature which can be determined in advance and which includes themixing of 'the mentioned gaseous medium with air containing oxygen. Thisbrings about an increase in the temperature and the pressure of the air.At the same time a raising of the pressure of the mixture of the gaseousmedium and of the air is achieved by a centrifugal force during acurvilinear streaming. Thereafter the mixture is braked and split bydiffusion means into a plurality of streams. At least a part of thestreams of the mentioned mixture of gaseous medium and air are thencollected in the combustion chamber in a combined single stream atincreased pressure and temperature, so that there takes place in thecombustion chamber an automatic ignition of fuel supplied thereto whileat the same time an expulsion of the rest of the mixture of the gaseousmedium and hot compressed air in the working device is passed to anexhaust to be consumed as a working energy medium as mentioned above. Asmentioned herein before, the mixing of the gaseous medium with air isperformed in an ejector chamber and in a slot chamber, as well aseventually, after insertion, in the combustion chamber, all of whichspaces or chambers have on both ends thereof open inlets and/or outletsand to which chambers the gaseous medium is supplied in an undirectionalaxial stream, which creates a vacuum in the ejection chamber and causesair to be sucked into the inlet and/or outlet openings of the variouschambers. As mentioned above, part of the mixture is returned to thecombustion chamber and this is deflected from the inner periphery of thecurvilinear streamed medium.

In order to start-up the waste gases generator, a number of means can beemployed. For example, one or more rocket cartridges or one or moresmall pressure cylinders with compressed gas or compressed gas from anexternal source, or generated by a fan or supplied through a mechanicalcompressor (none of which are shown in detail) may be used. The startingmedium may also be supplied into the ejector chamber through the outerjacket of a generaor jet or by means ofa generator blade device (neitherof which are shown).

A generator of waste gases suitable for the execution of the disclosedmethod steps generally comprises means for the acceleration and theexpansion of the medium located beyond the combustion chamber generallyformed by one or more jet means or by a cascade means. The ejectorchamber, the mixing chamber and the slot chamber or the outlet piping ofthe ejector are provided with deflecting blade means and/or a screen(not shown) and channels or slot means are formed by blade means locatedin the mixing chamber, a channel or a piping device are the slot meansso formed providing a diffusing means for the generator. The combustionchamber of the generator may be made to accomplish a parallel flowpattern on a transverse or annular chamber configuration.

The generator may include several mixing or slot chambers which have acurvilinear flow path, as well as a plurality of combustion chambers andgenerating jets and ejectors connected in series in order to achieve agreater degree of compression and in order to achieve a relativelygreater passage of waste gases. The generator may include also aninertial deflecting blade means for the stabilization of the flow and toguard against or prevent the occurrence of undesirable dynamic phenomenaof the gases. In addition, for power take off the drive of electricalsystems or for the fuel or other accessories, an inertial blade meansmay be used. The generator may also include in the combustion chamber aheated stabilizing means which may be heated by the waste gasesthemselves, or from an outer source in order to stabilize thecombustion. A vane valve or a compressor may also be used in thestarting generator or for purposes inducing a starting stream or acomplementary medium stream as well. The generator may further includean orifice plate, a flap valve or a blade throttling mechanism locatedin its suction branch or in its outlet piping in order to control thepower output and to stabilize the operation and the flow of the gases.For the same purposes, the slot chamber of the generator may be providedwith a plurality of swiveling slot vanes or may include diffusion meansprovided with controlable cross sectional areas and characteristics.Finally, the slot chamber, that is, the space in which compression bythe centrifugal force takes place, may contain an arrangement for acontinuous, controlable change of the curvature of the medium flow path.

One particularly important advantage of the method for the generation ofwaste gases according to the invention and also of the generator itselfresides in the fact that there is no need to compress the gas withseparate mechanical arrangements and, therefore, no need for the use oflarge and expensive compressors. The waste gases formed in the generatorhave a greatly increased temperature and kinetic energy and they may beused directly as a source of engine energy. An additional advantageresides in the fact that both the generator and the engine which aresupplied by the waste gases are of simple design, light in weight, havefew movable parts, exhibit greater efficiency and have a great poweroutput. Moreover, their principle operation is very simple.

Referring now more particularly to FIG. 1, the generator shown comprisesa combustion chamber 3 which includes a burner or flame tube 4, agenerator jet 8, a suction branch 9, a mixing chamber 11, a slot chamber13 and of an exhaust manifold 15. The combustion chamber 3 is providedwith a fuel inlet jet 1 and with an arrangement (not shown) to supply anappropriate gas or liquid fuel for combustion in a gas mixture havinghigher temperature. The end of the combustion chamber leads into thegenerator or jet 8 which in turn leads into the ejector area or zone andinto the mixing chamber 11. The ejector zone is formed by jet 8, suctionbranch 9 and mixing chamber 11.

The generated waste gases stream in the mixing chamber 11 by way of thejet 8. The stream of gases carries with it air which is sucked inthrough the suction branch 9 and then pases into the slot chamber 13 viathe mixing chamber 11. The waste gases are mixed with the air, aidedalso by means of a mixing mechanism 12 to form a homogeneous mixture ofthe working medium which flows as far as possible with a homogeneousspeed into the slot chamber 13. The jet 8, the suction branch 9, and themixing chamber 11 form together as mentioned above an ejector area orzone the function of which is to insure the needed excess of air duringcombustion in the combustion chamber. The slot portion 13 of thegenerator is provided with slots formed by vanes 14 to diminish anyunsuitable turbulence which arises by the mutual action (interaction) ofthe liquids which have considerably different speeds and which generallyoccur where waste gases flow from the jet 8 at great speeds incomparison to air being sucked in.

In addition, jet 8 is provided with a jacket 10 which is connected onone end with pipe 5 which provides an inlet for the starting medium asshown in greater details in FIG. 2 and on the other end to the outlet ofthe jet 8 forming a common opening with the jet and opening into theejector area or zone and into the mixing chamber 11 which also formspart of that zone. The starting means is further provided with a valve 6and with a starting medium source by way of an inlet pipe 7. As a sourcefor the starting medium can be used booster rockets or small pressurecylinders of compressed gas such as oxygen can be used as starting meansor medium. Valve 6 shown in FIG. 2 is replaced by an ignitionarrangement in those cases where booster rockets are used.

OPERATION The described generator operates as follows. Followingstarting through ignition by means of one of the usual starting means orarrangements mentioned above such as one or more rockets or with passingby way of valve 6 when it is opened, a stream of starting medium isformed which has a relative high kinetic energy so that reliableignition in the combustion chamber is certain.

The stream S of starting medium flows through the jacket 10 of the jetinto the ejector area or zone and into the mixing chamber 11. Duringflow through the outlet from the jacket 10, there is created a highlyfavorable double ejection effect caused by the sucking in of the streamE by stream G comprising the medium from the jet 8 and from thecombustion chamber 3. Consequently, there is created an intensive firststream of medium flowing in a desirable direction throughout the entiregenerator.

In the mixing chamber 11, a complicated effect comprising an interchangeof motive and thermal energy between the stream of starting medium andthe stream of the sucked in air, E, takes place. During starting the gasstream G sucked in from the jet 8 and from the combustion chamber 3 alsoparticpates in this effect. Under the influence of their kinetic energy,the streams S and E, as wellas G, flow into the mixing chamber 11thereby becoming mixed and into the curvilinear slot chamber 13 wherethe mixture is compressed by centrifugal force and is split into severalstreams C by means of the slots formed by the vanes 14. The rest of themixture flows out from the generator through the outlet piping N. Thestreams C which have been withdrawn and slowed down by the slots arejoined in the front part of the combustion chamber 3 so that arelatively slow stream of relatively low pressure is formed and directedon through the combustion chamber. Due to the pressure drop, which isgenerated by the centrifugal compression and by diffusion which causesbraking of the individual streams C there is formed an additional flowof initial mixture of air and starting medium into the combustionchamber 3, while at the same time, in the case of a suitablepredetermined flow rate the fuel jet 1 is opened and a predeterminedsupply of fuel is fed to the combustion chamber 3. The first ignition incombustion chamber 3 is performed by means of a spark plug 2. However,the first ignition takes place automatically in the case where boosterrockets are used to create a starting stream having an extremely hightemperature.

Ignition of the fuel in the combustion chamber 3 changes the fuel andthe air particles into a gas having a high thermal energy which passesinto and through the jet 8 by means of its kinetic energy. It flows as astream G from the combustion chamber 3 into jet 8 and gradually fullyreplaces the starting stream S.

As mentioned above, the combustion chamber 3 may be designed as aparallel flow chamber or as a transverse or an annular chamber flowchamber.

Although part of the generator stream G which enters into the mixingchamber with the sucked in air is in a rather cool state, it hasnevertheless a sufficiently high temperature and sufficient power toautomatically continuously ignite the gas or liquid fuel during furthercycles. However, in the event ignition does not take place, spark plugcan be employed as a reserve arrangement.

The generating of the pressure drop of the medium in the front portionof the combustion chamber 3 and the consequent warming of the medium tothe required temperature results in a continuous cycle and achieves asubstantial steady state of operation abalance of delivery of a supplyof fuel according to the needed energy of the medium flowing out of thegenerator.

In appreciating, the high efficiency and the power output of the wastegas generator of this invention, it is to be understood that all theenergy of the mixture of the waste gases and the air at those pointsdownstream from the ejector area or zone, including the energy gainedthrough the sucked in air as well as of the waste gases, that is, theso-cal led ejector efficiency is substantially completely utilized. Theenergy of the faster waste gases is used in the mixing chamber 1 1 andin the slot chamber 13 for accelerating of the air and as a useful poweroutput in the arrangement shown and which is connected through theexhaust manifold 15 to a consumer of such energy. In the event there isa presence of an excess air in the combustion chamber, for example, adouble amount in comparison to the stochiometric mixture or medium therewill be present as recycling takes place a considerable amount of theoxygen which possesses a high kinetic energy. In any event, as alreadymentioned, the sucked in air atains in the mixing chamber, in mixturewith the gaseous medium, the greatest possible kinetic energy.Consequently, an advantage of the method and of the device according tothe invention resides in the fact that it enables media which have arelatively low kinetic energy output to release substantially theirtotal kinetic energy by means of centrifugal forces. Therefore, inaccordance with the invention, the ejector area or zone does not form anelement which by its own limits of efficiency limits the efficiency ofthe entire device and which would result in only limited transmission ofthe kinetic energy and a specific relatively small power output.

In order to provide proper recycling or recirculation and balancedperformance, it is necessary to withdraw such a quantity of the mediumfrom the slot chamber through the slots which, under the givenconditions of the load of the generator, that is, with respect to backpressure on the side of the exhaust, throttling of the sucking in branchand the admission of the fuel to the combustion chamber to insure arecirculation and balanced performance. This quantity is readilydeterminable by calculation for any given system taking into account thedimensions of the generator, the particular fuels and waste gases beingcycled and their energy values. From the standpoint of control and inorder to achieve the optimum cycling and balanced performance, the poweroutput of the generator, measured by the amount and the condition of themedium in the exhaust piping and which is dependent on the particularadjustment of the slots, the admission of the fuel in the combustionchamber and the particular throttling properties of the sucked in aircan be suitably adjusted by varying the slot openings. The medium,withdrawn through the slots and compressed by diffusion is heated up inthe combustion chamber by the combustion of the fuel so that thereresults a flow through the jet having a kinetic energy which issubstantially in a steady, balanced state. The combustion and theoutflow of medium through the jet forms but one stage which is the laststage of the generator function and at the same time the first stage ofthe recirculation on recycling function. The last stage of the generatorfunction forms the outlet for the unsplit portion of the basic streamwhich flows from the slot chamber into the exhaust piping for theperformance of useful work.

In the comparison with presently known waste gas generators of theturbulent type, a generator according the invention exhibits manyadvantages. For example, the present construction permits the formationof highly energy-homogeneous split streams which result in highefficiency and stability of operation of the device. In addition, in adevice according to the invention there is lower friction between themedium flowing through the device and the walls of the chambers and as aconsequence of this smaller losses caused by turbulence and loss ofkinetic energy. Moreover, a generator in accordance with the inventionis flexible in design.

For example, a waste gas generator having a desired nominal output maybe best achieved by a cyclic arrangement which can be easily connectedin series or increased in size and capacity simply by the increasing thegenerator length vertically in relation to the plane of fluid flow ofthe generator stream, in which case the combustion chamber has a flatdesign which is very simple and easily adaptable to connect in series.

Referring now more particularly to FIG. 3, there is shown that anaircraft turboprop engine, having circularly connected thereto threegenerators such as that illustrated in FIG. 1. Their outlet piping isconnected to a common header 16 enclosing turbine blades 17. The suctiontubing of the generators is designated by 18. An exhaust manifold 19extends from the rear end of the engine which is also equipped with agear box 20 and an air-screw 21.

In a similar manner the illustrated waste gas generator can be assembledwith ajet engine in which the turbine and the air-screw are replaced bya jet reactor of a stationary combustion chamber.

The particular design of the main parts of the generator, such as thesucking and exhaust headers may be modified to properly mate with theengines.

The use of a waste gas generator according to the invention as a sourceof energy for heating kettles or defined space may be easily realized.The suction and the exhaust piping of the generator, as well as theother parts, may be complemented by deflecting blade arrangement inorder to provide for stream regulation and may be modified in shape,suitably adapted to the specific use.

Waste gas generators according to the invention, as well as theoperating method accomplished by these generators may also be used toachieve a recirculation ofa considerable amount of waste gases and toexhaust a relatively great amount of air at a low temperature. In thisregard, the generators also are suitable to serve as drive units forhovercrafts.

As mentioned before, waste gas generators according to the iventioneliminate the need for mechanical compression of the gases. Thisconsiderably decreases the complexity and the weight of the drive units.In use with combustion turbines, a considerable increase of the workingtemperature of the waste gases without the need to change the materialof the turbine blades can be achieved. This is so since the highesttemperature of the waste gases which come in contact with the heatresisting materials of the blades may be transmitted to the useful poweroutput stages rather than contacting the blades. On the other hand, thegenerator turbine blades may be omitted and replaced by a medium flow.In using a waste gas generator according to the invention with ajetengine, the engine need not include any movable parts, such asnulti-stage compressors, which are driven by appropriate turbines. Thisis extremely advantageous.

Engines equipped with a waste gas generator according to the inventionmay be easily designed for the desired power outout and also for a totalpower output by assembling in series. They are practically withoutvibrations in use, being uniformly balanced and in a perfect harmonywith the body of aircraft or other objects with which they are used. Theengines have a much longer service life than presently known combustionturbines and require little maintenance. In this regard, sincelubricating and cooling means are eliminated, their reliability isincreased. The costs of engines equipped with generators of thisinvention is only a fraction of the costs of known engines equipped withturbocompressors.

Engines equipped with a waste gas generator according to the inventionstart easily since there is no need to overcome the inertial power ofrotors which are usually included in konwn engines. Moreover, enginesequipped with waste gas generators of the invention attain uponstarting, instant the maximum output. Furthermore, since the waste gasescirculate in the engine in-a practically closed system, there is in theexhaust air only a relatively small amount of polluting andcontaminating gases in comparison with the total power output of theengine.

It is to be understood that numerous modifications of the embodiment ofthis invention may be made without departing from the spirit and scopeof the invention. Therefore, this invention is not to be limited to theembodiment disclosed herein except as defined in the appended claims.

What is claimed is:

l. A method for automatically and continuously operating a waste gasgenerator having high pressure, thermal and kinetic energies comprisingthe steps of supplying a working medium comprising waste gases from acombustion zone, flowing said working medium at an accelerating rateinto an ejection zone and then into a mixing zone arranged downstreamthereof in a curvillnear path to exert a centrifugal force thereon whileexpanding the working medium and while sucking an oxidant into saidejector zone by ejector effect and mixing said oxidant with said workingmedium while exchanging energy between said oxidant and said workingmedium to form additional working medium and while compressing themixture in said mixing zone, splitting the mixture into a plurality ofstreams and flowing a first part of said streams from said mixing zoneto exhaust for consumer use while flowing a second part of said streamsinto the combustion zone and forming a single stream thereof for use asoxidant material and for change of chemical energy in subsequent cycles.

2. A method as defined in claim 1 wherein an external energy source isused to circulate the first cycle of energy changes and transfers.

3. A method as defined in claim 2 wherein the external source of energyis compressed gas.

4. A method as defined in claim 2 wherein the external source of energyis supplied by rockets.

5. A method as defined in claim 1 wherein fuel is continuously deliveredto the combustion chamber.

6. A method as defined in claim 1 wherein air is the oxidant sucked intothe ejector zone by vacuum, said suction being caused by the flow of theworking medium from the combustion zone to the ejector zone.

7. A method as defined in claim 1 wherein the part of the working mediumflowed to exhaust for consumer use is taken from the inner periphery ofthe curvilinear stream of working medium.

8. A waste gas generator comprising at least one combustion chamberhaving a fuel jet leading thereto, at least one jet means into whichsaid combustion chamber leads located beyond said combustion chamber, atleast one ejector chamber onto which said jet means leads located beyondsaid jet means, at least one mixing chamber into which said ejectorchamber leads located beyond said ejector chamber and at least onecurved slot chamber into which said mixing chamber leads located beyondsaid mixing chamber, said slot chamber leading into said combustionchamber and to exhaust and consuming means, a suction branch leading tosaid jet means and an outer jacket means connected to said jet means atone end communicating with a source of starting medium.

9. A generator as defined in claim 8 including a flame tube located insaid combustion chamber.

10. A generator as defined in claim 8 including mixing means located inthe mixing chamber.

11. A generator as defined in claim 8 wherein the slot chamber isprovided with a plurality of vanes to provide slot openings onto, saidcombustion chamber.

12. A generator as defined in claim 8 wherein the chambers, suctionbranch and exhaust are open at both ends and are disposed in acurvilinear arrangement.

1. A method for automatically and continuously operating a waste gasgenerator having high pressure, thermal and kinetic energies comprisingthe steps of supplying a working medium comprising waste gases from acombustion zone, flowing said working medium at an accelerating rateinto an ejection zone and then into a mixing zone arranged downstreamthereof in a curvillnear path to exert a centrifugal force thereon whileexpanding the working medium and while sucking an oxidant into saidejector zone by ejector effect and mixing said oxidant with said workingmedium while excHanging energy between said oxidant and said workingmedium to form additional working medium and while compressing themixture in said mixing zone, splitting the mixture into a plurality ofstreams and flowing a first part of said streams from said mixing zoneto exhaust for consumer use while flowing a second part of said streamsinto the combustion zone and forming a single stream thereof for use asoxidant material and for change of chemical energy in subsequent cycles.2. A method as defined in claim 1 wherein an external energy source isused to circulate the first cycle of energy changes and transfers.
 3. Amethod as defined in claim 2 wherein the external source of energy iscompressed gas.
 4. A method as defined in claim 2 wherein the externalsource of energy is supplied by rockets.
 5. A method as defined in claim1 wherein fuel is continuously delivered to the combustion chamber.
 6. Amethod as defined in claim 1 wherein air is the oxidant sucked into theejector zone by vacuum, said suction being caused by the flow of theworking medium from the combustion zone to the ejector zone.
 7. A methodas defined in claim 1 wherein the part of the working medium flowed toexhaust for consumer use is taken from the inner periphery of thecurvilinear stream of working medium.
 8. A waste gas generatorcomprising at least one combustion chamber having a fuel jet leadingthereto, at least one jet means into which said combustion chamber leadslocated beyond said combustion chamber, at least one ejector chamberonto which said jet means leads located beyond said jet means, at leastone mixing chamber into which said ejector chamber leads located beyondsaid ejector chamber and at least one curved slot chamber into whichsaid mixing chamber leads located beyond said mixing chamber, said slotchamber leading into said combustion chamber and to exhaust andconsuming means, a suction branch leading to said jet means and an outerjacket means connected to said jet means at one end communicating with asource of starting medium.
 9. A generator as defined in claim 8including a flame tube located in said combustion chamber.
 10. Agenerator as defined in claim 8 including mixing means located in themixing chamber.
 11. A generator as defined in claim 8 wherein the slotchamber is provided with a plurality of vanes to provide slot openingsonto said combustion chamber.
 12. A generator as defined in claim 8wherein the chambers, suction branch and exhaust are open at both endsand are disposed in a curvilinear arrangement.